Oh, I see. It sometimes happens to me as well, and to other users. And I also tried to find out an explanation or any reason at all. Almost always those accounts have 1 or 2 posts, wrote no replies and got lots of comments under their old posts from users they have downvoted. It looks like an action without a reason. And, concerning your question you ask in the post, no one support them, but also they make no financial harm, just unpleasant feelings.
Well, consequence of democracy :)